Code review comment for lp:~andreas-pokorny/mir/load-all-supported-input-platforms

> Landed and then reverted:
> * Modifiers don't work any more (can't move/resize windows using Alt)
> * Default mouse speed too high
> * A little too many log messages come from this.
>
> Only the first issue is a blocker.

This should fix the issue..
https://code.launchpad.net/~andreas-pokorny/mir/combine-modifier-state-accross-devices/+merge/274372